#cli #rainbow #cat #colorful #colourful

app dota2cat

An updated fork of dotacat (which is like lolcat, but fast)

3 releases

0.2.3 Aug 18, 2022
0.2.2 Feb 5, 2022
0.2.1 Nov 15, 2021

#769 in Command line utilities

MIT license

102 lines


This is an updated version of the dotacat crate. The original crate's name was a pun on lolcat (because DOTA is a similar game to LOL), so I named mine "DOTA 2 cat" :L

The only real difference between this crate and the original is that I've updated the dependencies, modernised it to use Rust edition 2021, and fixed an issue with a breaking change in clap.


dota2cat can be installed with cargo, Rust's package/dependency manager:

cargo install dota2cat

To more easily facilitate replacing dotacat with dota2cat, the executable is still named dotacat.

The original README continues below.


dotacat is meant to be a replacement to lolcat. If you're not aware, lolcat is a rather silly program which behaves like cat, but produces a colourful, rainbow output.



$ time echo hi | lolcat
real    0m0.422s
user    0m0.393s
sys     0m0.028s

I use lolcat in my .bashrc file, so this amount of time is not ideal for me.

In contrast:

time echo hi | dotacat

real    0m0.045s
user    0m0.030s
sys     0m0.020s

Why the name?

Because Dota is better than LoL (According to people - I play neither)


If you have cargo installed, just run: cargo install dotacat

If not, head over to the releases page and download the latest release. Then run:

chmod +x dotacat
sudo mv dotacat /usr/local/bin


    dotacat [FLAGS] [OPTIONS] [files]...

    <files>...    Files to concatenate(`-` for STDIN)

    -h, --help       Prints help information
    -i, --invert     Invert fg and bg
    -V, --version    Prints version information

    -F, --freq <freq>        Rainbow frequency [default: 0.1]
    -S, --seed <seed>        Rainbow seed, 0 = random [default: 0.0]
    -p, --spread <spread>    Rainbow spread [default: 1.0]

	dotacat f - g	Output f's contents, then stdin, then g's contents.
	fortune | dotacat	Display a rainbow cookie.


~101K SLoC